Clock recovery system with triggered phase error measurement
    1.
    发明授权
    Clock recovery system with triggered phase error measurement 有权
    具有触发相位误差测量的时钟恢复系统

    公开(公告)号:US07571339B2

    公开(公告)日:2009-08-04

    申请号:US11407515

    申请日:2006-04-19

    Abstract: A measurement system includes a clock recovery system and a measurement module coupled to the clock recovery system. The clock recovery system has an associated response characteristic. The clock recovery system receives an input signal and recovers a clock signal from the input signal. The measurement module is coupled to the clock recovery system and measures a phase error signal received from the clock recovery system, time-referenced to a trigger signal that is applied to the measurement module, where the phase error signal represents the phase difference between the input signal and the recovered clock signal. A processor applies the associated response characteristic to the measured phase error signal to determine the phase of the input signal.

    Abstract translation: 测量系统包括时钟恢复系统和耦合到时钟恢复系统的测量模块。 时钟恢复系统具有相关的响应特性。 时钟恢复系统接收输入信号并从输入信号中恢复时钟信号。 测量模块耦合到时钟恢复系统,并测量从时钟恢复系统接收的相位误差信号,时间参考应用于测量模块的触发信号,其中相位误差信号表示输入端之间的相位差 信号和恢复的时钟信号。 处理器将相关联的响应特性应用于所测量的相位误差信号以确定输入信号的相位。

    Optical phase standard
    2.
    发明授权
    Optical phase standard 失效
    光学相位标准

    公开(公告)号:US07064839B2

    公开(公告)日:2006-06-20

    申请号:US10427622

    申请日:2003-04-30

    CPC classification number: G01M11/338 G01M11/331

    Abstract: An optical phase standard includes a coupler dividing an applied optical signal between a measurement interferometer and a frequency reference branch. Resulting signals at the outputs of the measurement interferometer and the frequency reference branch are sampled. The samples acquired at the output of the frequency reference branch are mapped to optical frequencies that are traceable to a frequency standard provided by an absorption cell. This mapping determines the optical frequencies at which the samples acquired are at the output of the measurement interferometer. From the acquired samples at the output of the measurement interferometer, phase characteristics of a device under test (DUT) are extracted. Aspects of the optical phase standard are alternatively implemented according to an optical phase standardization method.

    Abstract translation: 光学相位标准包括在测量干涉仪和频率参考分支之间划分施加的光信号的耦合器。 对测量干涉仪和频率参考分支的输出端产生的信号进行采样。 在频率参考分支的输出处获取的样本被映射到可追溯到由吸收单元提供的频率标准的光频率。 该映射确定所获取的样本在测量干涉仪的输出处的光频率。 从测量干涉仪输出端的采集样本中,提取被测器件(DUT)的相位特性。 根据光学相位标准化方法交替实现光学相位标准的方面。

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